Please answer all questions
In a survey of 3,890 travelers, 1,441 said that location was very important for choosing a hotel and 1,208 said that reputation was very important in choosing an airline. Complete parts (a) through (c) below. a. Construct a 95% condence interval estimate for the population proportion of travelers who said that location was very important for choosing a hotel. D 51: s D (Round to four decimal places as needed.) Determine the upper-tail critical value ta/2 in each of the following circumstances. a.1u=0.90,n=53 d.1a=0.90,n=12 b.1oi=0.95,n=53 e.1-oz=0.99,n=63 c.1u=0.90,n=69 a. t= |:| (Round to four decimal places as needed.) b. t= |:| (Round to four decimal places as needed.) c. t= |:| (Round to four decimal places as needed.) d. t= |:| (Round to four decimal places as needed.) 9. t= |:| (Round to four decimal places as needed.) Assuming that the population is normally distributed, construct a 90% confidence interval for the population mean, based on the following sample size of n = 5. 1, 2, 3, 4, and 30 Change the number 30 to 5 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval. Find a 90% confidence interval for the population mean, using the formula or calculator. Sus (Round to two decimal places as needed.) Change the number 30 to 5. Find a 90% confidence interval for the population mean, using the formula or calculator. Sus (Round to two decimal places as needed.) What is the effect of an outlier on the confidence interval? O A. The presence of an outlier in the original data decreases the value of the sample mean and greatly inflates the sample standard deviation, widening the confidence interval. O B. The presence of an outlier in the original data increases the value of the sample mean and greatly inflates the sample standard deviation, widening the confidence interval. O C. The presence of an outlier in the original data decreases the value of the sample mean and greatly decreases the sample standard deviation, narrowing the confidence interval. O D. The presence of an outlier in the original data increases the value of the sample mean and greatly decreases the sample standard deviation, narrowing the confidence interval.The data below represents the overall miles per gallon (MPG) of 2008 SUVs priced under $30,000. Complete parts a and b below. 21, 21, 19, 21, 17, 18, 17, 16, 21, 19, 20, 16, 22, 17, 20, 18, 16, 16, 16, 21, 17, 24 a. Construct a 99% confidence interval estimate for the population mean miles per gallon of 2008 SUVs priced under $30,000, assuming a normal distribution. Sus (Round to two decimal places as needed.) b. Interpret the interval constructed in (a). Choose the correct answer below. O A. With 99% confidence, the mean miles per gallon in the sample of 2008 SUVs is the population mean. O B. With 99% confidence, the mean miles per gallon in the population of 2008 SUVs is the sample mean. O C. With 99% confidence, the mean miles per gallon in the sample of 2008 SUVs is somewhere in the interval. O D. With 99% confidence, the mean miles per gallon in the population of 2008 SUVs is somewhere in the interval
